feat(storage): show job error details in history table and output panel

web/src/pages/Storage.tsx

@@ -453,6 +453,7 @@ export default function Storage() {
                   <th className="pb-2">Tipo</th>
                   <th className="pb-2">Estado</th>
                   <th className="pb-2">Exit</th>
+                  <th className="pb-2">Error</th>
                   <th className="pb-2">Fecha</th>
                   <th className="pb-2">Duración</th>
                 </tr>
@@ -480,6 +481,13 @@ export default function Storage() {
                       </span>
                     </td>
                     <td className="py-2 font-mono">{j.exit_code >= 0 ? j.exit_code : "—"}</td>
+                    <td className="py-2">
+                      {j.error ? (
+                        <span className="text-red-400" title={j.error}>
+                          ⚠ {j.error.split("\n")[0].slice(0, 50)}{j.error.split("\n")[0].length > 50 ? "…" : ""}
+                        </span>
+                      ) : null}
+                    </td>
                     <td className="py-2">{new Date(j.created_at).toLocaleString()}</td>
                     <td className="py-2">
                       {j.started_at && j.finished_at
@@ -567,6 +575,19 @@ function OutputPanel({
           <span className="text-slate-500">exit={job.exit_code}</span>
         )}
       </div>
+      {job.error && (
+        <div className="mb-2 rounded border border-red-700 bg-red-900/40 p-3">
+          <div className="mb-1 flex items-center gap-2 text-xs font-semibold text-red-300">
+            <span>⚠ Error</span>
+            {job.exit_code >= 0 && (
+              <span className="text-red-400/70">exit={job.exit_code}</span>
+            )}
+          </div>
+          <pre className="whitespace-pre-wrap break-words text-xs text-red-200 font-mono">
+            {job.error}
+          </pre>
+        </div>
+      )}
       <pre
         ref={outputRef as React.RefObject<HTMLPreElement>}
         className="max-h-80 overflow-auto rounded bg-slate-900 p-3 text-xs text-slate-300 font-mono"
@@ -574,7 +595,9 @@ function OutputPanel({
         {filtered.length === 0
           ? job.output
             ? job.output.split("\n").slice(-200).join("\n")
-            : "iniciando…"
+            : job.status === "running"
+              ? "iniciando…"
+              : "Sin salida capturada."
           : filtered.join("\n")}
       </pre>
     </>